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F. GLOSS. ROTARY PUMP AND ROTARY MOTOR.

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NTTnn STATES i FRIEDRICH GLOSS, AOF BOEBLINGEN, GERMANY.

ROTARY PUMP AND ROTARY MOTOR.

srnCIrICAtrIoN for-ming part of Letters Patent No. 592,237, dated october 2e, 18er. Application filed December 14, 1896. Serial No. 615 ,614. (No model.)

To @ZZ whom it may concern.-

Be it known that I, FRIEDRICH CLoss, of Boeblingen, Wrtemberg, German Empire, have invented new and useful Improvements in Rotary Pumps and Rotary Motors, of which the following is a specification.

The subject of the present invention is a special self-acting packing for vane-pumps for gases and liquids, as well as for rotaryvaned steam-engines and the like, formed by means of rollers loosely located in the ends of the vane. p v

In the accompanying drawings is shown in Figures l to 4 a vane-pump in which the vaneaXis lies Centrally in the vane-chamber, while Figs. 5 and 6 show a pump or rotary steamengine whose vane-axis is arranged to lie eccentrically in the vane-chamber.

Inthe pump illustrated in Figs. l to 4., Fig. l represents a vertical cross-section, Fig. 2 a vertical longitudinal section, Fig. 3 a front view, and Fig. 4 a horizontal section, of the pump. Fig. 5 is a transverse section, and Fig. 6 a longitudinal section, of a pump having the vanes disposed eccentricallyin the vanechamber.

The central line of the axis E of the vane C of the pump coincides with the central line of the lower circular hollowed-out part of the pump-casing vA and is placed in the journals b of the covers B, where it may, if necessary, be packed by means of stufIing-boxes. At both ends of the vane C, in recesses c in the same, rollers D are laid loosely, which by the rotation of the vane in consequence of the centrifugal force, as well as through the resistance of the material to be pumped, will be thrown outward, pressing strongly on the wall of the pump-casing and rolling along upon the same.

In the upper part of the casing A, lying upon the vane C, and pressed against the vane C and against one side of the wall of the upper casing by the resistance in the pressure-chamber, is placed a roller F, which on account of its greater diameter is constructed advantageously as a hollow roller, as shown, and which automaticallyl provides the packing between the pressure-chamber and suction-chamber in each portion of the vane C.

The vane C, as well as the rollers D and F, iit exactly between the two covers B of the pump.

The pump operates in the following manner: Assuming that it rotates in the direction indicated by the arrow in Fig. 1, the liquid, air, or Vthe like enters through the short pipe ot into the pump and discharges from the same through the short pipe ct. Since in the pressure-chamber of the pump obviously a pressure greater than in the suction-chamber al- Ways exists, the roller F is continually pressed firmly against the vane O, as well-as against 'one side wall in the upper part of the casing A. In a similar manner the two rollers D through the pressure of the fluid will be pressed automatically on one side against the rear arm of the recess c in the vane and on the other side against the vane-casing A. The rollers D thereby completely pack against the casing-wall and in the recess of the vane. In a similar manner the roller F continually packs against the vane Gand one side of the upper casing.

Since in each revolution of the vane C its two vane ends, together with the rollers D, pass under the roller F, the forward arm at the vane-recess c is somewhat thickened, as shown at c', and constructed to extend nearly to the casing-wall for the object ofproducing a smooth movement during said passage.

In addition, for the purpose of preventing the throwing out of the rollers D during the tour of the upper vane-chamber, the arms of the recess c overlap the rollers D upon their outer sides.

Since the rollers D and F rotate together the friction is exceedingly small and the efficiency unexpectedly high.

Previous trials of such 'a pump, used as a vacuum apparatus, have given a nearly complete vacuum of two cubic meters on the mercurial column.

The effective work in a water pump amounted to 97.5 per cent of the theoretical estimates.

The fluid enters and leaves the pump without a shock. In the pumping of air or gases this is obviously true to a still greater extent.

Figs. 5 and 6 of the drawings illustrate two ICO diferent vertical sections through a vanepump with a vane C lying eccentrieally to the casing A', which, however, is packed on the outside in a manner similar to the previously-described pump. The recesses e in the vane C' have here a greater radial depth, and the rollers D are made larger7 because the rollers have to equalize the eccentricity between the vane and casing. (See Fig. 5.) The packing between the suction-chamber and the pressure-chamber results here in the saine manner through a loosely-lying roller F', that runs upon the vane C', or at times upon the rollers DQ and produces a complete packing. In the same manner the said rollers D', having their greater portions hollow, pack in the recesses c of the vane C', and against the wall of the easing A".

The same construction as that of the pump, Figs. 5 and 6, is applicable also, with advantage, as a rotary steam-engine, hydraulic 1no tor, and as a Working cylinder for compressed air, gas, or petroleum motors.

Both kinds of pumps may be adapted to Work in either direction of rotation.

I claim- In a rotary pump, the combination with the cylinder having inlet and outlet ports on its opposite sides, a rotary vane mounted in the cylinder between said ports and to one side of the line of the same, said vane having longitudinal recesses in its edges, rollers mounted looselyin said recesses and bearing against the wall of the cylinder, and a valveroller resting on the upper side of the vane.

In testimony whereof I have signed this specification in the presence of two subscribing Witnesses.

FRIEDRICH GLOSS.

Vitnesses AUGUST DRAUTZ, CHRis'rIAN BAUER. 

